A painter places an 11-ft ladder against a house. The base of the ladder is 3 ft from the house. How high on the house does the ladder reach?

Question

Gunner Poole

Mathematics

7 June, 20:46

A painter places an 11-ft ladder against a house. The base of the ladder is 3 ft from the house. How high on the house does the ladder reach?

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Answers (1)

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Marcos Hernandez · Answer 1

Use Pythagoras theorem

11^2 = h^2 + 3^2 where h is the height of ladder agaianst the wall

h^2 = 11^2 - 3^2

= (11+3) (11-3) = 14 * 8 = 112

h = sqrt 112 = 10.58 ft